Apparatus and method for managing multimedia playback

ABSTRACT

An apparatus and method of managing reproduction of multimedia contents. A multimedia reproduction method includes: receiving identification information on predetermined multimedia contents; receiving first reproduction information on the predetermined multimedia contents, from a multimedia reproduction management apparatus receiving the transmitted identification information; and if first identification information contained in the received first reproduction information corresponds with the transmitted identification information, reproducing the predetermined multimedia contents based on the first reproduction information. According to the apparatus and method, even when a DVD title being played back is replaced by another DVD title, or when the power of a DVD playback apparatus is suddenly interrupted, the reproduction position information is safely maintained.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Korean Patent Application No.2003-71853, filed on Oct. 15, 2003 in the Korean Intellectual PropertyOffice, the disclosure of which is incorporated herein in its entiretyby reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an apparatus and method of managingreproduction of multimedia contents, and more particularly, to anapparatus and method of managing reproduction of a DVD title.

2. Description of the Related Art

FIG. 1 is a diagram showing a conventional digital video disk (digitalversatile disc, DVD) reproducing apparatus and a DVD output apparatus.

Referring to FIG. 1, a DVD reproducing apparatus 11 and a DVD outputapparatus 12 are connected to each other through a dedicated line.

The DVD reproducing apparatus 11 reproduces DVD titles (i.e., DVD imageand sound signals) stored in the DVD. The DVD output apparatus 12receives the image and sound signals reproduced in the DVD reproducingapparatus 11 through the dedicated line and outputs the received imageand sound signals.

The DVD reproducing apparatus 11 has an embedded memory storingreproduction position information (for example, bookmark information). Auser who wants to reproduce a predetermined DVD title, places this DVDtitle into the DVD reproducing apparatus 11, and if a reproductionbutton on a control panel or a remote controller of the DVD reproducingapparatus 11 is pushed, this DVD title is reproduced. If the user wantsto store a reproduction position, a reproduction position storing buttonon the control panel or remote controller is pushed and a reproductionposition storing command is transmitted. Then, if the DVD reproductionapparatus 11 receives the reproduction position storing command, thereproduction position information is stored in the embedded memory.Thereafter, if it is requested by the user, reproduction of the DVD isperformed from the predetermined position of the DVD, by using thereproduction position information stored in the memory.

In the conventional technology described above, the reproductionposition information is made to be stored in the memory embedded in theDVD reproducing apparatus 11, but due to the general use of low capacitymemories, there are following problems. First, there is a limit in thememory space to store a variety of reproduction position informationitems. Secondly, reproduction position information cannot be stored fora long enough period. Thirdly, if a DVD title being played back isreplaced by another DVD title, the reproduction position informationpreviously stored is deleted.

SUMMARY OF THE INVENTION

In accordance with an aspect of the present invention, an apparatus andmethod by which even when a DVD title being played back is replaced byanother DVD title, or when the power of a DVD playback apparatus issuddenly cut, the reproduction position information is safely kept areprovided.

According to an aspect of the present invention, there is provided amultimedia reproducing method including: receiving identificationinformation on predetermined multimedia contents; receiving firstreproduction information on the predetermined multimedia contents, froma multimedia reproduction management apparatus receiving the transmittedidentification information; and if identification information containedin the received first reproduction information corresponds with thetransmitted identification information, reproducing the predeterminedmultimedia contents based on the first reproduction information.

According to another aspect of the present invention, there is provideda multimedia reproducing apparatus including: a multimedia contentsidentification information transmission unit which transmitsidentification information of predetermined multimedia contents; amultimedia contents reproduction information reception unit whichreceives first reproduction information on the predetermined multimediacontents, from a multimedia reproduction management apparatus receivingthe identification information; and a multimedia contents reproductionunit which if identification information contained in the received firstreproduction information corresponds with the transmitted identificationinformation, reproduces the predetermined multimedia contents based onthe first reproduction information.

According to another aspect of the present invention, there is provideda multimedia reproduction management method including: receivingpredetermined identification information from a multimedia reproducingapparatus; extracting first reproduction position information ofmultimedia contents indicated by the received predeterminedidentification information; and transmitting first reproductioninformation, including the predetermined identification information andthe extracted first reproduction position information, to the multimediareproducing apparatus.

According to another aspect of the present invention, there is provideda multimedia reproduction management apparatus including: a multimediacontents identification information reception unit which receivespredetermined identification information from a multimedia reproducingapparatus; a multimedia contents reproduction position informationextraction unit which extracts first reproduction position informationof multimedia contents indicated by the received predeterminedidentification information; and a multimedia contents reproductioninformation transmission unit which transmits first reproductioninformation, including the predetermined identification information andthe first reproduction position information, to the multimediareproducing apparatus.

According to another aspect of the present invention, there is provideda computer readable recording medium having embodied thereon a computerprogram for the multimedia reproducing method.

According to another aspect of the present invention, there is provideda computer readable recording medium having embodied thereon a computerprogram for the multimedia reproduction management method.

Additional aspects and/or advantages of the invention will be set forthin part in the description which follows and, in part, will be obviousfrom the description, or may be learned by practice of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects and advantages of the invention will becomeapparent and more readily appreciated from the following description ofthe embodiments, taken in conjunction with the accompanying drawings ofwhich:

FIG. 1 is a diagram showing a conventional DVD reproducing apparatus anda DVD output apparatus;

FIG. 2 is a diagram of the structure of a multimediareproduction/management system according to an embodiment of the presentinvention;

FIG. 3 is a diagram of the structure of the multimedia reproducingapparatus and the multimedia reproduction management apparatus shown inFIG. 2;

FIG. 4 is a flow diagram of a multimedia reproduction and/or managementmethod according to an embodiment of the present invention;

FIG. 5 is a flowchart of the operations performed by a multimediareproducing method according to an embodiment of the present invention;and

FIG. 6 is a flowchart of the operations performed by a multimediareproduction management method according to another embodiment of thepresent invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Reference will now be made in detail to the embodiments of the presentinvention, examples of which are illustrated in the accompanyingdrawings, wherein like reference numerals refer to the like elementsthroughout. The embodiments are described below to explain the presentinvention by referring to the figures.

Referring to FIG. 2, a multimedia reproduction/management systemaccording to an embodiment of the present invention includes amultimedia reproduction management apparatus 211, multimedia reproducingapparatuses 212 through 214, and a multimedia output apparatus 215.

When a user pushes a power button on a control panel or a remotecontroller of any one of the multimedia reproducing apparatuses 212through 214, and the corresponding multimedia reproducing apparatus 212through 214 is started, the corresponding multimedia reproducingapparatus 212 through 214 transmits a start signal for the multimediareproducing apparatus, to the multimedia reproduction managementapparatus 211 through a network. Here, the corresponding multimediareproducing apparatus 212 through 214 indicates an apparatus capable ofreproducing multimedia contents, including DVD titles, such as a DVDreproducing apparatus 212, a desktop PC 213, or a notebook PC 214installed at home, and the network mainly indicates a home network suchas that typically found in a home 21. The network may be wired orwireless.

If the start signal transmitted by any one of the multimedia reproducingapparatuses 212 through 214 is received, the multimedia reproductionmanagement apparatus 211 transmits an acknowledgement signal for thestart signal to the corresponding multimedia reproducing apparatus 212through 214 through the network. As described above, the multimediareproducing apparatuses 212 through 214 may be installed mainly at homeand therefore, the multimedia reproduction management apparatus 211 mayalso be installed mainly at home. Accordingly, the multimediareproduction management apparatus 211 may be mounted on an existing homeserver.

If the acknowledgement signal transmitted by the multimedia reproducingapparatus is received, the corresponding multimedia reproducingapparatus 212 through 214 transmits identification information onmultimedia contents from an information storage medium loaded in thecorresponding multimedia reproducing apparatus 212 through 214 to themultimedia reproduction management apparatus 211 through the network. Ifmultimedia contents are a DVD title, identification information may be aunique key of the DVD title. This unique key value is generated based ona universal disk format (UDF) property. For example, a unique key valuecan be generated by combining a video title set identifier (VTS_ID), avideo title set number (VTSN), etc. Here, VTS_ID indicates theidentification of a DVD title and the VTSN indicates an ordered numberassigned to each piece of a DVD title formed with a plurality of pieces.That is, the identification information is information allowing each DVDdisc to be distinguished.

The multimedia reproduction management apparatus 211 receives theidentification information on the multimedia contents transmitted by thecorresponding multimedia reproducing apparatus 212 through 214 throughthe network, extracts first reproduction position information of themultimedia contents indicated by the received identificationinformation, and transmits first reproduction information including theidentification information and the extracted first reproduction positioninformation. As described above, since the multimedia reproductionmanagement apparatus 211 is mounted on the home server, reproductionposition information on a variety of multimedia contents can be storedin a large capacity storage (not shown) disposed in the home server orexternally to the home server. At this time, in order to indicate themultimedia contents corresponding to reproduction position information,reproduction position information of predetermined multimedia contentsare stored together with the identification information of themultimedia contents, forming a pair. Identification information issearched for in the storage disposed in the multimedia reproductionmanagement apparatus 211, and if the search result indicates that theidentification information is stored, first reproduction positioninformation paired with this is extracted. The first reproductionposition information is reproduction position information recordedpreviously, and may include time information or frame information, orboth. For example, reproduction position information formed with timeinformation and frame information can be hour: minute: second: frame.With this information, the previous reproduction position can bedetermined accurately.

The corresponding multimedia reproducing apparatus 212 through 214receives the first reproduction information transmitted by themultimedia reproduction management apparatus 211, through the network.If first identification information included in the received firstreproduction information corresponds to the transmitted identificationinformation and the received first reproduction information includesfirst reproduction position information, then the correspondingmultimedia reproducing apparatus 212 through 214 reproduces themultimedia contents from the reproduction position indicated by thefirst reproduction position information. In the conventional method, ifa first DVD title being played back is replaced by a second DVD title,and then, the second DVD title being played back is replaced again bythe first DVD title, the previous reproduction position cannot beidentified such that a search should be performed from the beginning ofthe first DVD title. However, according to aspects of the presentinvention, the previous reproduction position information is extractedfrom the storage disposed in the multimedia reproduction managementapparatus 211, and the extracted reproduction position information istransmitted together with first identification information. Then, thecorresponding multimedia reproducing apparatus 212 through 214 receivesthe reproduction position information and the first identificationinformation from the multimedia reproduction management apparatus 211through the network and confirms whether or not numbers of thetransmitted identification information and the first identificationinformation match. If the confirmation result indicates that theidentification numbers match, the received reproduction positioninformation is recognized as the previous reproduction positioninformation of the multimedia contents as currently placed, andreproduction is performed from the reproduction position according tothis reproduction position information. By doing so, the inconvenienceof the conventional method as described above can be solved.

In addition, since reproduction position information and identificationinformation stored in the storage disposed in the multimediareproduction management apparatus 211 can be used by the plurality ofmultimedia reproducing apparatuses 212 through 214, other apparatuses aswell as the corresponding apparatus currently reproducing multimediacontents can begin reproduction from the previous reproductionpositions.

When reproduction of the multimedia contents being played back isstopped, the corresponding multimedia reproducing apparatus 212 through214 transmits second reproduction information, including secondidentification information of the multimedia contents and secondreproduction position information of the reproduction stop time, to themultimedia reproduction management apparatus 211 through the network. Ofcourse, the second reproduction position information is information todetermine a reproduction position when the multimedia contents arereproduced next time.

The multimedia reproduction management apparatus 211 receives the secondreproduction information transmitted by the corresponding multimediareproducing apparatus 212 through 214 through the network, and storesthe received second reproduction information. The second reproductioninformation will be stored in the storage disposed in the multimediareproduction management apparatus 211.

If the second identification information from the correspondingmultimedia reproducing apparatus 212 through 214 is received, themultimedia reproduction management apparatus 211 searches the storagewith this second identification information, extracts the secondreproduction position information paired with this second identificationinformation, and transmits the second reproduction position informationto the corresponding multimedia reproducing apparatus 212 through 214through the network.

Additionally, multimedia contents may be exchanged between themultimedia reproduction management apparatus 211 at the home 21 withanother multimedia reproduction management apparatus at a remotelocation 22 via a network such as the Internet.

FIG. 3 is a diagram of the structure of a multimedia reproducingapparatus and a multimedia reproduction management apparatus shown inFIG. 2. Referring to FIG. 3, the multimedia reproducing apparatus 3includes a multimedia reproducing apparatus start signal transmissionunit 31, a start acknowledgement signal reception unit 32, a multimediacontents identification information transmission unit 33, a multimediacontents reproduction information reception unit 34, a multimediacontents reproduction unit 35, and a multimedia contents reproductioninformation transmission unit 36.

When the multimedia reproducing apparatus 3 is started, the multimediareproducing apparatus start signal transmission unit 31 transmits astart signal of the multimedia reproducing apparatus 3, to themultimedia reproducing management apparatus 4 through the network. Thestart acknowledgement signal reception unit 32 receives anacknowledgement signal for the start signal through the network from themultimedia reproduction management apparatus 4, which receives the startsignal transmitted by the reproducing apparatus start signaltransmission unit 31. If the acknowledgement signal is received by thestart acknowledgement signal reception unit 32, the multimedia contentsidentification information transmission unit 33 transmits identificationinformation for multimedia contents through the network to themultimedia reproduction management apparatus 4. The multimedia contentsreproduction information reception unit 34 receives first reproductioninformation for the multimedia contents from the multimedia reproductionmanagement apparatus 4, which receives the identification informationtransmitted by the multimedia contents identification informationtransmission unit 34.

If first identification information included in the first reproductioninformation received by the multimedia contents reproduction informationreception unit 34 corresponds with the transmitted identificationinformation and first reproduction position information is included inthe received first reproduction information, the multimedia contentsreproduction unit 35 reproduces the multimedia contents at thereproduction position indicated by the first reproduction positioninformation. If any reproduction position information on the multimediacontents is not included in the received first reproduction information,the multimedia contents are reproduced from a reproduction startposition of the multimedia contents. The case that reproduction positioninformation is not included indicates that the multimedia contents havenever been reproduced, or have been reproduced to the end. Accordingly,in this case, the multimedia contents are reproduced from the beginning.

When reproduction of the multimedia contents being played back in themultimedia contents reproduction unit 35 is stopped, the multimediacontents reproduction information transmission unit 36 transmits secondreproduction information, including the identification number and secondreproduction position information of the reproduction stop time, to themultimedia reproduction management apparatus 4 through the network. Ifreproduction is performed for some time by the multimedia contentsreproduction unit 35, the reproduction position changes. Accordingly, ifthe reproduction is stopped, the second reproduction information,including the second reproduction position information of the stop time,is transmitted to the multimedia reproduction management apparatus 4through the network, and the multimedia reproduction managementapparatus 4 receives and stores the second reproduction information inthe multimedia contents reproduction information storage unit 47.

Meanwhile, the multimedia contents reproduction information transmissionunit 36 can periodically transmit third reproduction information,including identification information on multimedia contents and thirdreproduction position information of a reproduction time, on themultimedia contents currently being played back in the multimediacontents reproduction unit 35. Thus, reproduction position informationstored in the storage disposed in the multimedia reproduction managementapparatus 4 is periodically updated. This is to update the reproductionposition information in advance in order to prepare for a case where thereproduction in the multimedia reproducing apparatus 3 is stopped by anunknown cause such as a sudden power cut-off.

Referring to FIG. 3, the multimedia reproduction management apparatus 4includes a multimedia reproducing apparatus start signal reception unit41, a start acknowledgement signal transmission unit 42, a multimediacontents identification information reception unit 43, a multimediacontents reproduction position information extraction unit 44, amultimedia contents reproduction information transmission unit 45, amultimedia contents reproduction information reception unit 46, and amultimedia contents reproduction information storage unit 47.

The multimedia reproducing apparatus start signal reception unit 41receives a start signal from the multimedia reproducing apparatus 3through the network. If the start signal is received by the multimediareproducing apparatus start signal reception unit 41, the startacknowledgement signal transmission unit 42 transmits an acknowledgementsignal for the start signal, to the multimedia reproducing apparatus 3.The multimedia contents identification information reception unit 43receives identification information on multimedia contents through thenetwork from the multimedia reproducing apparatus 3, which receives theacknowledgement signal transmitted by the start acknowledgement signaltransmission unit 42.

The multimedia contents reproduction position information extractionunit 44 extracts first reproduction position information of multimediacontents indicated by the identification information received by themultimedia contents identification information reception unit 43. Themultimedia contents reproduction position information extraction unit 44searches the multimedia reproduction information storage unit 47 for theidentification information, and if the identification information isstored in the multimedia reproduction information storage unit 47,extracts first reproduction position information of the multimediacontents indicated by the identification information from the multimediareproduction information storage unit 47. Here, the multimediareproduction information storage unit 47 is a storage disposed in themultimedia reproduction management apparatus 4. It is understood thatthe storage may be located externally to the multimedia reproductionmanagement apparatus 4.

The multimedia contents reproduction information transmission unit 45transmits the first reproduction information, including firstidentification information, and the first reproduction positioninformation extracted by the multimedia contents reproduction positioninformation extraction unit 44, to the multimedia reproducing apparatus3 through the network. The multimedia contents reproduction informationreception unit 46 receives second reproduction information, includingsecond identification information and second reproduction positioninformation of the multimedia contents, through the network from themultimedia reproducing apparatus 3, which receives the firstreproduction position information transmitted by the multimedia contentsreproduction information transmission unit 45. Here, the firstreproduction position information is the previous reproduction positioninformation stored in the multimedia contents reproduction informationstorage unit 47, and the second reproduction position information isinformation on a reproduction position changed by the reproduction ofthe multimedia reproducing apparatus 3. The multimedia contentsreproduction information storage unit 47 stores the second reproductioninformation received by the multimedia contents reproduction informationreception unit 46.

FIG. 4 is a flow diagram of a multimedia reproduction and/or managementmethod according to an embodiment of the present invention. Referring toFIG. 4, the operations forming the multimedia reproduction and/ormanagement method will now be explained.

When a multimedia reproducing apparatus is started, the start signal ofthe multimedia reproducing apparatus is transmitted through a network inoperation 401. Then, if the transmitted start signal is received, anacknowledgement signal for the start signal is transmitted through thenetwork in operation 402. Next, if the transmitted acknowledgementsignal is received, identification information on multimedia contents istransmitted through the network in operation 403. Then, theidentification information on the transmitted multimedia contents isreceived through the network, and if matching identification informationis stored, first reproduction position information for the multimediacontents indicated by the stored identification information is extractedin operation 404. Next, first reproduction information, including firstidentification information and extracted first reproduction positioninformation, is transmitted through the network in operation 405. Next,the transmitted first reproduction information is received, and if thefirst identification information included in the received firstreproduction information corresponds with the identification informationtransmitted in operation 403, and first reproduction positioninformation is included in the received first reproduction information,the multimedia contents are reproduced from the reproduction positionindicated by the first reproduction position information in operation406. Next, if the reproduction of multimedia contents being played backis stopped, second reproduction information, including identificationinformation of multimedia contents and second reproduction positioninformation of the reproduction stop time, is transmitted through thenetwork in operation 407. Then, the transmitted second reproductioninformation is received through the network and the received secondreproduction information is stored in operation 408.

FIG. 5 is a flowchart of the operations performed by a multimediareproducing method according to an embodiment of the present invention.Referring to FIG. 5, the operations forming the multimedia reproducingmethod will now be explained.

If a multimedia reproducing apparatus is started in operation 501, astart signal of the multimedia reproducing apparatus is transmitted to amultimedia reproduction management apparatus through a network inoperation 502. Then, an acknowledgement signal for the start signal fromthe multimedia reproduction management apparatus, which receives thetransmitted start signal, is received through the network in operation503. Then, if the acknowledgement signal is received, identificationinformation on multimedia contents is transmitted to the multimediareproduction management apparatus through the network in operation 504.Then, first reproduction information on multimedia contents from themultimedia reproduction management apparatus, which receives thetransmitted identification information, is received through the networkin operation 505. Then, if first identification information included inthe received first reproduction information matches the transmittedidentification information, and first reproduction position informationis included in the received first reproduction information in operation506, multimedia contents are reproduced from the reproduction positionindicated by the first reproduction position information in operation507. If reproduction position information is not included in thereceived first reproduction information in operation 506, the multimediacontents are reproduced from the reproduction start position of themultimedia contents in operation 508. Then, third reproductioninformation, including third identification information of themultimedia contents currently being played back and third reproductionposition information of a reproduction time, is periodically transmittedto the multimedia reproduction management apparatus through the networkin operation 509. Then, if the reproduction of multimedia contents beingplayed back is stopped in operation 510, second reproductioninformation, including second identification information and secondreproduction position information corresponding to the reproduction stoptime, is transmitted to the multimedia reproduction management apparatusthrough the network in operation 511.

FIG. 6 is a flowchart of the operations performed by a multimediareproduction management method according to another embodiment of thepresent invention. Referring to FIG. 6, the operations forming themultimedia reproduction management method will now be explained.

If a start signal of a multimedia reproducing apparatus from amultimedia reproducing apparatus is received through a network inoperation 601, an acknowledgement signal for the start signal istransmitted to the multimedia reproducing apparatus through the networkin operation 602. Then, identification information of multimediacontents from the multimedia reproducing apparatus, which receives thetransmitted acknowledgement signal, is received through the network inoperation 603. Then, if the received identification information isstored, first reproduction position information of multimedia contentsindicated by this identification information is extracted in operation604. Then, first reproduction information, including the identificationinformation and the extracted first reproduction position information,is transmitted to the multimedia reproducing apparatus through thenetwork in operation 605. Then, second reproduction information,including second identification information and second reproductionposition information, from the multimedia reproducing apparatus, whichreceives the first reproduction position information, is receivedthrough the network in operation 606. Then, the received secondreproduction information is stored in operation 607.

It is understood that the embodiments of the present invention describedabove can be written as computer programs and can be implemented ingeneral-use digital computers that execute the programs using a computerreadable recording medium.

The computer readable recording medium is any data storage device thatcan store data which can be thereafter read by a computer system.Examples of the computer readable recording medium include magneticstorage media (e.g., ROM, floppy disks, hard disks, etc.), opticalrecording media (e.g., CD-ROMs, or DVDs), and storage media such ascarrier waves (e.g., transmission through the Internet).

While the present invention has been particularly shown and describedwith reference to exemplary embodiments thereof, it will be understoodby those of ordinary skill in the art that various changes in form anddetails may be made therein without departing from the spirit and scopeof the present invention as defined by the following claims. Thepreferred embodiments should be considered in a descriptive sense onlyand not for purposes of limitation. Therefore, the scope of theinvention is defined not by the detailed description of the inventionbut by the appended claims, and all differences within the scope will beconstrued as being included in the present invention.

According to aspects of the present invention, by storing reproductionposition information of multimedia contents such as DVD titles, in anexternal memory such as a home server memory, the following effects canbe achieved. First, a memory space large enough to store variousreproduction position information items for a long enough period can besecured, and the cost for a memory storing reproduction positioninformation disposed in a DVD reproducing apparatus can be saved.

Secondly, since reproduction position information is stored in anexternal memory, even when a DVD title being played back is replaced byanother DVD title, or when the power of a DVD playback apparatus issuddenly interrupted, the reproduction position information is safelykept.

Thirdly, since reproduction position information of a predetermined DVDtitle can be transmitted to another DVD reproducing apparatus, thereproduction position information stored in the DVD reproducingapparatus can be automatically recognized and used such that userconvenience is improved.

Although a few embodiments of the present invention have been shown anddescribed, it would be appreciated by those skilled in the art thatchanges may be made in these embodiments without departing from theprinciples and spirit of the invention, the scope of which is defined inthe claims and their equivalents.

What is claimed is:
 1. A multimedia reproducing method, comprising:transmitting identification information on a predetermined multimediacontent to a multimedia management apparatus; receiving, identificationinformation identifying the predetermined multimedia contents to bereproduced and a first reproduction position information, from themultimedia management apparatus; determining whether the receivedidentification information corresponds to the transmitted identificationinformation on the predetermined multimedia contents; reproducing thepredetermined multimedia contents based on the determining, from areproduction position indicated by the first reproduction positioninformation; wherein the reproduction position the most recentlyreproduced position among reproduction positions at which thepredetermined multimedia contents are reproduced by at least one ofmultimedia reproducing apparatuses; transmitting a start signal to themultimedia management apparatus; and receiving an acknowledgment signalfor the start signal from the multimedia management apparatus whichreceives the start signal and transmitting identification informationfor the predetermined multimedia content; wherein when it is determinedthat the multimedia contents are a DVD title, identification informationmay be a unique key of the DVD title generated based on a universal diskformat (UDF) property by combining a video title set identifier(VTS_ID), a video title set number (VTSN).
 2. The method of claim 1,wherein the identification information identifying the predeterminedmultimedia contents to be reproduced and the first reproduction positioninformation are included in a reproduction information.
 3. The method ofclaim 1, further comprising: transmitting second reproductioninformation including the identification information on thepredetermined multimedia contents and second reproduction positioninformation indicating a reproduction stop time, to the multimediamanagement apparatus if reproduction of the multimedia contents isstopped.
 4. The method of claim 3, wherein the transmitting the secondreproduction information further comprises periodically transmittingthird reproduction information, including the identification informationon the predetermined multimedia contents being reproduced and thirdreproduction position information of the reproduction time.
 5. Amultimedia reproducing apparatus, comprising: a multimedia contentsidentification information transmission unit which transmitsidentification information on predetermined multimedia contents; amultimedia contents reproduction information reception unit whichreceives identification information identifying the predeterminedmultimedia contents to be reproduced and a first reproduction positioninformation, from a multimedia management apparatus which receives theidentification information and stores the first reproduction positioninformation; and a multimedia contents reproduction unit whichdetermines whether the received identification information correspondsto the transmitted identification information on the predeterminedmultimedia contents ˜and reproduces the predetermined multimediacontents based on the determination, from a reproduction positionindicated by the first reproduction position; wherein the reproductionposition is the most recently reproduced position among reproductionpositions at which the predetermined multimedia contents are reproducedby at least one of multimedia reproducing apparatuses; transmitting astart signal to the multimedia management apparatus; and receiving anacknowledgment signal for the start signal from the multimediamanagement apparatus which receives the start signal and transmittingidentification information for the predetermined multimedia content;wherein when it is determined that the multimedia contents are a DVDtitle, identification information may be a unique key of the DVD titlegenerated based on a universal disk format (UDF) property by combining avideo title set identifier (VTS_ID), a video title set number (VTSN). 6.The apparatus of claim 5, wherein the identification informationidentifying the predetermined the multimedia contents to be reproducedand the first reproduction position information are included inreproduction information.
 7. The apparatus of claim 5, furthercomprising: a multimedia contents reproduction information transmissionunit which if reproduction of the predetermined multimedia contents isstopped, transmits second reproduction information including theidentification information on the predetermined multimedia contents andsecond reproduction position information of a reproduction stop time, tothe multimedia management apparatus.
 8. The apparatus of claim 7,wherein the multimedia contents reproduction information transmissionunit periodically transmits third reproduction information, includingthe identification information on the predetermined multimedia contentsbeing reproduced and third reproduction position information of areproduction time, to the multimedia management apparatus.
 9. Amultimedia reproduction management method, comprising: receiving,predetermined identification information of the multimedia contents froma plurality of multimedia reproducing apparatuses; extracting, firstreproduction position information of the multimedia contents indicatedby the received predetermined identification information; andtransmitting, first reproduction information, including (i) thepredetermined identification information to identify the multimediacontents and (ii) the extracted first reproduction position informationenabling the multimedia contents to be reproduced at a reproductionposition included in the reproduction position information, to themultimedia reproducing apparatus; wherein the reproduction position isthe most recently reproduced position among reproduction positions atwhich the multimedia contents are reproduced by at least one ofmultimedia reproducing apparatuses; transmitting a start signal to themultimedia management apparatus; and receiving an acknowledgment signalfor the start signal from the multimedia management apparatus whichreceives the start signal and transmitting identification informationfor the predetermined multimedia content; wherein when it is determinedthat the multimedia contents are a DVD title, identification informationmay be a unique key of the DVD title generated based on a universal diskformat (UDF) property by combining a video title set identifier(VTS_ID), a video title set number (VTSN).
 10. The multimediareproduction management method of claim 9, further comprising: receivingsecond reproduction information, including the predeterminedidentification information and second reproduction position informationcorresponding to a reproduction stop time, from a first multimediareproducing apparatus which receives the first reproduction positioninformation; and storing the received second reproduction information.11. The multimedia reproduction management method of claim 10, whereinthe receiving the predetermined identification information from themultimedia reproducing apparatus, comprises extracting, the firstreproduction position information indicated by stored predeterminedidentification information if the predetermined identificationinformation is stored with the received second reproduction information.12. A multimedia management apparatus, comprising: a multimediareproduction information storage unit a multimedia contents reproductionposition information storing unit which stores first reproductionposition information; a multimedia contents identification informationreception unit which receives predetermined identification informationfrom multimedia reproducing apparatuses; a multimedia contentsreproduction position information extraction unit which extracts thefirst reproduction position information of multimedia contents indicatedby the predetermined identification information; and a multimediacontents reproduction information transmission unit which transmitsfirst reproduction information, including the predeterminedidentification information and the first reproduction positioninformation to identify the multimedia contents to be reproduced, to themultimedia reproducing apparatus; wherein the first reproductionposition information includes a reproduction position which is the mostrecently reproduced position among reproduction positions at which thepredetermined multimedia contents are reproduced by at least one ofmultimedia reproducing apparatuses; transmitting a start signal to themultimedia management apparatus; and receiving an acknowledgment signalfor the start signal from the multimedia management apparatus whichreceives the start signal and transmitting identification informationfor the predetermined multimedia content; wherein when it is determinedthat the multimedia contents are a DVD title, identification informationmay be a unique key of the DVD title generated based on a universal diskformat (UDF) property by combining a video title set identifier(VTS_ID), a video title set number (VTSN).
 13. The multimedia managementapparatus of claim 12, further comprising: a multimedia contentsreproduction information reception unit which: receives secondreproduction information, including the predetermined identificationinformation and second reproduction position information whichcorresponds to a reproduction stop time, from the multimedia reproducingapparatus which receives the extracted reproduction positioninformation; and wherein the multimedia reproduction information storageunit stores the second reproduction information.
 14. The multimediamanagement apparatus of claim 13, wherein the multimedia contentsreproduction position information extraction unit searches themultimedia reproduction information storage unit for the predeterminedidentification information, and if the predetermined identificationinformation is stored in the multimedia reproduction information storageunit, extracts the first reproduction position information indicated bythe stored predetermined identification information from the multimediareproduction information storage unit.
 15. A computer readablenon-transitory magnetic or optical recording medium having embodiedthereon a computer program for a multimedia reproducing method ofclaim
 1. 16. A computer readable magnetic or optical recording mediumhaving embodied thereon a computer program for a multimedia managementmethod of claim
 9. 17. A multimedia reproduction system, comprising: aplurality of reproducing apparatuses which reproduce contents from aninformation magnetic or optical recording medium; and a multimediamanagement apparatus which stores reproduction position informationindicating a location from which the contents are most recentlyreproduced by at least one of multimedia reproducing apparatuses andmanages reproduction of the contents for the plurality of reproducingapparatuses according to the stored reproduction position informationand identification information corresponding to the contents and iscommunicatively coupled with the plurality of reproducing apparatuses,wherein the plurality of reproducing apparatuses periodically transmitsthe reproduction position information and the identification informationduring reproduction of the contents to the multimedia managementapparatus for storage such that at a later time the at least onereproducing apparatus determines a previous reproduction positionaccording to the stored reproduction position information andidentification information, wherein the stored reproduction positioninformation and identification information are used to identify themultimedia contents to be reproduced; transmitting a start signal to themultimedia management apparatus; and receiving an acknowledgment signalfor the start signal from the multimedia management apparatus whichreceives the start signal and transmitting identification informationfor the predetermined multimedia content; wherein when it is determinedthat the multimedia contents are a DVD title, identification informationmay be a unique key of the DVD title generated based on a universal diskformat (UDF) property by combining a video title set identifier(VTS_ID), a video title set number (VTSN).
 18. The system of claim 17,wherein the plurality of reproducing apparatuses requests the previousreproduction position by transmitting identification information to themultimedia management apparatus, the identification informationcorresponding to the previous reproduction position, the multimediamanagement apparatus searches the stored reproduction positioninformation and identification information for a match to theidentification information and transmits the previous reproductionposition to the at least one reproducing apparatus when a match is foundsuch that the plurality of reproducing apparatuses begin reproducingfrom a location on the information storage medium corresponding to theprevious reproduction position.
 19. The method of claim 2, wherein thereproduction information is shared by the multimedia managementapparatus and the plurality of multimedia reproducing apparatuses via anetwork, and reproduction of the predetermined multimedia contents isremotely controlled by using the reproduction information, by at leastone apparatus via the network.
 20. The apparatus of claim 6, wherein thereproduction information is shared by the multimedia managementapparatus and the plurality of multimedia reproducing devices via anetwork, and reproduction of the predetermined multimedia contents isremotely controlled by using the reproduction information via thenetwork.
 21. The apparatus of claim 12, wherein the reproductioninformation is shared by the multimedia management apparatus and theplurality of multimedia reproducing apparatuses via a network, andreproduction of the predetermined multimedia contents is remotelycontrolled by using the reproduction information, by at least oneapparatus via the network.
 22. The computer readable magnetic or opticalrecording medium of claim 15, wherein rhea reproduction informationcomprising the identification information identifying the predeterminedmultimedia contents to be reproduced and the first reproduction positioninformation is shared by the multimedia management apparatus and theplurality of multimedia reproducing apparatuses via a network, andreproduction of the predetermined multimedia contents is remotelycontrolled by using the reproduction information, by at least oneapparatus via the network.
 23. The computer readable magnetic or opticalrecording medium of claim 16, wherein rhea reproduction informationcomprising the identification information identifying the predeterminedmultimedia contents to be reproduced and the first reproduction positioninformation is shared by the multimedia management apparatus and theplurality of multimedia reproducing apparatuses via a network, andreproduction of the predetermined multimedia contents is remotelycontrolled by using the reproduction information, by at least oneapparatus via the network.